Transmission-gear mechanism.



R. W. COFFEE.

TRANSMISSION GEAR MECHANISM,

AIPLIOATION FILED JAN. 12, 1909. 970,4 7, Patented se tfzo, 1910.

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R. W. COFFEE.

TRANSMISSION GEAR MECHANISM. APPLICATION mum um 12, mo.

Patented Sept. 20, 1910.

3 SHEETS-SHEET 2.

R. W. COFFEE.

TRANSMISSION GEAR MECHANISM.

APPLICATION FILED JAN.12,1909.

970,467.- Patented Sept. 20, 1910.

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UNITED STATES PATENT OFFICE.

ROBERT W, .COFFEE, OF RICHMOND, VIRGINIA, ASSIGNOR T0 LEWIS M. KEIZER,OF

- BALTIMORE, MARYLAND.

TRANSMISSION-GEAR MECHANISM.

Specification of Letters Patent.

Patented Sept. 20, 1910.

To an whom 'it may concern:

Be it known that I, ROBERT W. Corrnn, residing at Richmond, in thecounty of Henrico and State of Virginia, have invented certain new anduseful Improvements in Transmission-Gear Mechanism, of which thefollowing is a specification.

My invention relates to certain new and useful improvements intransmission gear mechanisms, and particularly seeks to provide atransmission gear mechanism wherein a driven shaft is actuated fromadrive shaft and connections between the drive and driven shafts, wherebythe driven shaft may be turned 'in a direction opposite to the directionof movement of the drive shaft at a slow rate of speed, at anintermediate rate of speed, or at the same rate of speed as the driveshaft, and wherein means are provided for turning the driven shaft inthe same direction as the drive shaft but at a slow speed.

My inventlon also has for its object to provide a single lever actuatedmechanism for shifting the gear mechanisms that effect the operativeconnections between the drive and driven shafts.

My invention also includes those novel details of construction,combination and arrangement of parts, all of which will be first fullydescribed, and then be specifically pointed out in the appended claims,reference being had to the accompanying drawings, in which Figure 1, isa sectional view and part elevation illustrating my invention, the partsbeing inthe position they assume when the driven shaft is rotatingreversely t0 the drive shaft at a slow rate of speed. Flg. 2,

.is an elevation, parts'being broken away,

showing the position of the parts when a slow movement is imparted tothe driven shaft to cause it to turn slowly in the same direction as thedrive shaft. Fig. 3, is an elevation, parts being broken away, showingthe position of the parts when the drive shaft is turning the drivenshaft in a direction opposite to the direction of rotation of the driveshaft and at the same speed of rotation as that of the drive shaft. aside elevation of my invention showing the general arrangement of thecontrolling members for shifting. the clutch and drum band devices andthe shiftable gearson the power shaft and the rotary cam shaft for Fig.4, is

actuating said members. Fig. 5, is a vertical transverse section of themachine on the line 5--5 of Fig. 1. Fig. 6, is a detail face view of myinvention looking in the direction of arrow X on Fig. 4.

In the practical application of my invention, when the same is used foran automobile transmission mechanism, the driven shaft rotates in adirection opposite to the direction of rotation of the drive shaft, sothat when the slow, intermediate and fast speeds of the driven shaft areattained they will effect a forward movement of the vehicle and when thedriven shaft rotates in the same direction as the drive shaft and at theslowest speed, the vehicle will be driven in a reverse direction.

In the drawings in which like letters and numerals of reference indicatelike parts in all' of the figures 1 represents the housing which is{provided with bearings 1 for the drive sha t 10, that may be connectedin any approved manner with the prime mover, (not shown). The casing 1is also provided with bearings 1 for the driven shaft 20, whichcarriesthe sprocket 21, from which the power is taken. The driven shaft 20carries a series of gears 22, 23 and 24, keyed to turn with the shaft20.

11 designates a shiftable gear member that is slidably mounted on thedrive shaftlO, but is keyed to turn with the drive shaft 10, by a key10, (see Fig.2). The shifting gear member 11 is provided with a inion 11to mesh with the gear 24 on the rivenshaft 20 at times. The means forshifting the shiftable gear member 11 will be described later.

Secured to the shaft 10 to turn therewith is a sun gear 12 that mesheswith orbital gears 13 on stub shafts 13" that are secured to a disk 14,which has a hub 14 that is ap ertured to permit passage of the shaft 10and projects through the hub 15 of a rim gear 15 that has an internalgear face 15 to mesh with the orbital gears 13, and external gear face15 to mesh with the gear 22 on the driven shaft, the hub 15 turning in abearing 1 of the casin 16 designates a crum, keyed or otherwise secured,to the hub 14 of the disk 14 to turn therewith, the drum 16 havinga'brake band receiving surface 16 around which the brake band 17 passes.

18 represents a clutch disk that is keyed ids to turn with the shaft 10,and hasa hub 18 on which the shifting clutch member 19 is mounted, theclutch member 19 having a groove 19 for a purpose presently to appear.

Within the drum 16 is an expanding ring 16 that is secured at 16 to thedrum and 00- operates with an expander 18 that has a shaft portion 18that projects through a bearing 18 and carries a lever 18 that isadapted to be engaged by the shifting clutch member 19 to expand theclutch ring 16 and lock the clutch disk 18 and the drum 16 to turntogether with the drive shaft at times.

25 designates a rotatable operating shaft which is provided with pins25*, 25", 25 and 25 arranged ninety degrees apart with respect to theaxis of rotation of the shaft, each of which pins 25, 25", 25 and 25turn with the shaft-in separate and distinct circles, see Figs. 3 and 4.The shaft 25 is mounted in bearings 1 in a bracket 1 secured to thecasing 1 and coiiperates with the various shifting members hereinafterreferred to. On the bracket l projected from' the casing 1 is a lever 26that is pivoted at 26* to the bracket 1 and at 26 to the band 19 of theshifting clutch member 19 where-- in two sections connected by a take-upunion 28, as shown, so that the arm 27 may be shortened or lengthenedfor purpose of adjustment.v At the forward end the arm 27 is providedwith a hook portion 27 that cooperates with the pin or crank member 25on the shaft 25.

- The brake band 17 which cotiperates with the drum 16 is secured at oneend at 17 to the bracket 1 and has its other end 17 secured to a bellcrank lever 28 through the medium of a link 17, the bell crank lever 28being fulcrumed at 28 to a bracket on the casing 1 and being pivotallyconnected to an arm 29, the arm 29 being of similar construction as thearm 27 and having a take-up coupling 29 for the two sections of the arm29 for a similar purpose to the coupling 28. At its free end the arm 29has a hook 29 that cotiperates with the pin or crank 25 on the shaft 25.

30 designates a rock shaft mounted in bearings 1 on the casing 1, andcarrying within the casin 1 an arm 31, which is pivoted at 31 to t eband 31 of the shiftable ear member 11 whereb when the shaft 30 1srocked, the arm 31 will shift themember 11 from one position to another.

Outside of the casing the rock shaft 30 is provided with a double lever32 to one end of which at 32*, a short arm 33 is pivoted, while attheother end of the lever 32, as at 32*, a short arm 34 is likewisepivoted, the short arms 33 and 34 being respectively pivoted at 33 and34 to arms 33 and 34 respectively, the arm 33 atvits free end having ahook portion 33 to cotiperate with the pin or crank member 25 on theshaft 25, while the arm 34 at its free end has a hook member 34 tocoiiperate with the pin or crank member 25 of the rock shaft 25.

The rock shaft 25 is provided with a pinion 25 to cotiperate with a rack28 on a reciprocating arm 29 that is pivoted at'29 to an actuating lever30 through the me.- dium of which the arm 29 may be reciprocated torotate the shaft 25 in one direction or the other. I

In practice the rack portion 28 is made sufficiently long to enable therequired number of turns to be applied to the shaft 25 to effect theoperation of the device as hereinafter explained, the rod 29 being shownbroken away in the drawings for convenience of illustration.

Operation: Assume the partsto be posi-' tioned as shown in F ig. 1, withthe engine shaft imparting motion to the'driven shaft in a directionopposite to the direction of rotation of the drive shaft and at a slowspeed. When the parts are positioned as shown in Fig. 1 todrive thedriven shaft at a slow speed the band 17 is ofi' and the a continuedmovement of the rod 29 in the direction of the arrow in Fig. 6, willthen cause the lever 31 to bemoved through the medium of the rock shaft30 and lever 32 until the gear 11 is brought into mesh with the gear 23.The driven shaft will be rotated in a direction opposite to thedirection of rotation of the drive shaft and at an intermediate speed.Now assume it is desired to impart to the driven shaft a movement in adirection opposite to that of the driven shaft and at the same speed ofthe drive shaft, the operator then moves the handle 30 to move the rod29 in a direction opposite to the arrow in Fig. 6, until the pin 25comes into engagement with the hook 33.

He then moves the lever to move the rod 29 in the direction of the arrowin Fig. 6, a sufficient distance to move the gears 11 and 11 in theposition shown in Fig. 3, after which he moves the rod, 29 again in adirection opposite to the arrow in Fig. 6, untilthe pin 25 engages thehook .27 The operator then moves the lever 30 to move the rod 29 in thesame direction as the arrow in Fig, 6, a sufficient amount to move therod 27 to move the shiftable clutch 19 to apply the clutch band 17 tothe inner periphery of the drum 16 and lock the drum 16 to the plate 18,thus locking the gear 15, plate 14 and drive shaft 10, together so thatthe gear 15 will rotate with the drive shaft and at the same speed, thusimparting an opposite rotation at the same speed to the driven shaft 20.Now assume that it is desired to impart a rotation to the driven shaftin the same direction as the drive shaft and at a slow movement, toreverse the movement of the vehicle the operator leaves the gears 11"11in the position shown in Figs. 2 and 3, and releases the movable clutchmember 19, by releasing the engagement of the pin 25 with the hook 27 bymoving the bar or rod 29 in a direction opposite to that of the arrow inFig. 6 continuing such movement a sufficient time to bring the pin 25into engagement with the hook 29 and as soon as this engagement iseffected the operator moves the rod 29 in the direction of the arrow inFig. 6, a sufficient distance to move'the rod 29 to apply the brake band17 and hold the drum '16 stationary, thus holding the plate 14 and theorbit gears 13 stationary, the plate 14 which carries the orbital gearsbeing stationary. The rotation of the drive shaft 10 will be imparted tothe gear 15 through the orbital gears to turn it in a direction oppositeto the direction of rotation so as to impartmotion to the driven shaftat a slow rate of speed'and in the same direction as the motion of thedrive shaft.

From the foregoing description taken in connection with the accompanyingdrawings it is thought the complete construction, operation and manyadvantages of my invention will be readily understood by those skilledin'the art to which the invention appertams. It should be mentioned thatthe provision of the pivots 27, 33, 34 and the pivot 29, as the shaft 25is rotated counterclockwise to bring the respective pins into engagement with the respective hooks, the arms 27, 29, 33 and 34 will rise topermit the pins to come under and into engagement with the hooks 27 29,33 and 34 respectively.

It is to be understood that the pins 25,

25", 25 and 25 are spaced ninety degrees apart around the axis of theshaft 25 and turn in different distinct planes so that only one pin willbe in engagement with one hook at a time.

It should be understood that the shaft 25 is turnable in eitherdirection and so far as the respective members 27, 29, 33 and 34 areconcerned the shaft 25 may be turned any number of revolutions in eitherdirection.

' When the shaft 25 is turned clockwise, as

found in Fig. 6, the respective members 25, 25*, 25*,and 25 will come1nto engagement with the respective members 27, 29, 33 and 34 atintervals and after moving the respective members 27, 29, 33 and 34 fromleft to right in Fig. 6, the required distance, the members 25 and 25etc. will leave the members 27, 29, etc, and permit the shaft 25 tocontinue its clockwise rotation. After the rack 28 has been moved to thelimit of its movement to the left in Fig. 6, it may be carried back tothe limit of its movement in the direction opposite the arrow in Fig. 6,as the shaft 25 will readily turn in a counterclockwise directionwithout moving the members 27, 29, 33 and 34.

What I claim is z 1. Transmission gearing comprising a drive shaft, adriven shaft and means actuated from the drive shaft for imparting adirect fast movement to the driven shaft, and an indirect slow movementto the driven shaft, mechanism for effecting the adjustments of saidmeans, said mechanism including a single controlling lever.

2. Transmission caring comprising a drive shaft, and a driven shaft,means for imparting slow, intermediate and fast movement to the drivenshaft in a direction opposite to that of rotation of the drive shaft,means forming a cotiperative part of one of said last named means forimparting movement to the driven shaft at a slow speed in the samedirection as the drive shaft, and mechanism for effecting theadjustments of all of said means, said mechanism including a singlecontrolling lever.

3. Transmission gearing comprising a drive shaft and a driven shaft,direct gear connections between the drive and driven shafts foreffecting slow and intermediate movements to the driven shaft in adirection opposite to the movement of the drive shaft, planetary gearconnections between the drive and driven shafts for effecting a slowmovement of the driven shaft in the same direction as the drive shaft,means for shifting said direct gear connections to bring one or theother into operative relation, and other means for effecting theoperative relation of the planetary gear mechanism to impart slowmovement to the driven shaft in the same direction as that of the driveshaft, other means cooperating with the planetary gear means for causinga direct connection to be made between the drive and driven shaftsthrough said planetary gear mechanism to effect a fast movement of thedriven shaft in a direction opposite to the drive shaft, and a singlemeans for controlling said mechanism.

4. Transmission gearing comprising the drive shaft and the driven shaft,direct gear connections between the drive and driven shafts foreffecting slow and intermediate movements to the driven shaft in adirection opposite to the movement of the drive shaft,

tion of the planetary gear mechanism to im' part the slow movementto-the driven shaft in the same direction as that of the drive shaft andother means cooperating with the planetary gear means for causing adirect connection to be made between the drive and driven shafts throughsaid planetary gear mechanism to efiect a fast movement of the drivenshaft in a direction op osite the drive shaft, and a single means orcontrolling said mechanisms, said single means including a singleactuating lever.

5. Transmission gearing, comprising a drive shaft, a driven shaft,gearing between said shafts for effecting several drives of the drivenshaft, mechanism for shifting said gearing for anyof such drives, and asingle handle or lever having a connection with the shifting mechanism,such that one movement of the handle sets the shifting mechanism for thedrive desired, and a movement of the handle in the reverse directionoperates said mechanism to shift the gears.

6. Transmission gearing, comprising a drive shaft, a driven shaft,gearing between said shafts for effecting several drives of the drivenshaft, mechanlsm for shifting said gearing for any of such drives, and asingle handle or leverhaving a connection with the shifting mechanismsuch that by one of a variety of movements of the handle in onedirection, the shifting mechanism is set for the drive desired, and by amovement of the handle in the other direction, the shifting mechanismis'operated to shift the gears.

7. Transmission gearing, comprising a drive shaft, a driven shaft,gearing between said shafts for effecting several drives of the drivenshaft, mechanism for shifting said gearing for any of such drives, and asingle lever or handle having a connection with the shifting mechanismsuch that by one and the same movement of the handle, the shift ingmechanism is operated to shift the gears for any desired drive.

8. Transmission gearing, comprising a drive shaft, a driven shaft,gearing between said shafts for effecting several drives of the drivenshaft, means for shiftingsaid gearing according to the drive desired, amovable member having means for engaging each of said shifting meansseparately, and handle connected with said movable member, said handleoperating to move the engaging means of the movable member into engage-,ment with the proper corresponding gear shifting means, and thenoperating by a handle connected with said rotary shaft, said handleoperating to move one of the lugs of the rotary shaftinto engagementwith the proper corresponding gear shifting means, and then operating byfurther movement of the rotary shaft to actuate such selected gearshifting means.

10. Transmission gearing, comprising 'a drive shaft, a driven shaft,gearing between said shafts foreffecting a forward and a reverse driveof the driven shaft, mechanism for shifting said gearing for either ofsuch drives, and a single lever or handle having a connection with theshifting mechanism such that by selected movements of the handle, theshifting mechanism is operated to shift the gear for either the forwardor the reverse drive.

'11. Transmission gearing comprising a drive shaft and a driven shaft,planetary ear members in connection with said shafts designed to impartto the driven shaft a movement from the drive shaft in the samedirection as that of the drive shaft, and means for locking said gearmechanism to the drive shaft to impart motion to the driven, shaft in anopposite direction to that of the drive shaft.

12. Transmission gearing comprising a drive shaft and a driven shaft,planetary gear mechanism in connection with said shafts'designed toimpart to the driven shaft a movement from the drive shaft in the samedirection as that of the drive shaft, means for locking said gearmechanism to the drive shaft to impart mot-ion to the driven shaft in anopposite direction to that of the drive shaft and at a greater speedthan the first mentioned movement.

13. Transmission gearing comprisin a drive shaft, a driven shaft, a gearcarried by the driven shaft, a gear through which the drive shaftprojects, said gear having an internal rim gear portion and an externalgear portion to mesh with the driven shaft gear, a pinion on the driveshaft, sun gears connecting the pinion with the internal rim portion ofsaid drive shaft gear, combined 14. Transmission gearing comprisin adrive shaft, a driven shaft, a gear carried by the driven shaft, :1.gear through which the drive shaft projects, said gear having aninternal rim gear portion and an external gear portion to mesh with thedriven shaft gear, a pinion on the drive shaft, sun gears connecting thepinion with the internal rim portion of said drive shaft gear, combinedwith means for holding the sun gears from rotation with the drive shaftto impart an indirect driveto the driven shaft, and another means forlocking the sun gears, the internal rim gear and the pinion to rotatewith the drive shaft to impart direct motion to the driven shaft, and ata greater speed thanthe first mentioned movement.

15. Transmission gearing comprising a drive shaft, a driven shaft, agear carried by the driven shaft, a gear through which the drive shaftprojects, said gear having an internal rim gear portion and an externalgear portion to mesh with the driven shaft gear, a pinion on the driveshaft, sun gears connectmg the pinion with the internal rim ortion ofsaid drive shaft gear, combine with means for holding the sun gears fromrotation around the drive shaft to impart an indirect drive to thedriven shaft, and another means for locking the sun gear, the internalrim gear and the pinion together to rotate with the drive shaft toimpart direct mot-ion to the driven shaft and a shifting mechanism tooperate said holding and locking means, and a single lever forselectively operating said shifting mechanism.

16. Transmission gearing comprising a drive shaft, a driven shaft, agear carried by the driven shaft, a gear through which 'the drive shaftprojects, said gear having an internal rim gear portion and an externalgear portion to mesh with the driven shaft gear, a pinion on the driveshaft, sun gears connecting the pinion with the internal rim portion ofsaid drive shaft gear, combined with means for holding the sun gearsfrom rotation around the drive shaft to impart an indirect drive to thedriven shaft, and another means for locking the sun gears, the internalrim gear and the pinion to rotate with the drive shaft to impart directmotion to the driven shaft, and at a greater speed than the firstmentioned movement, and a shifting mechanism to operate said holdingmeans, and a single lever for selectively operating said shiftingmechanism.

17. Transmission gearing comprising a drive shaft, a driven shaft, gearconnections between said shaftsdesigned to impart to the driven shaftdirect motion from the drive shaft when under one adjustment andindirect movement to the driven shaft when under another adjustment, anda single lever operating means for selectively effecting saidadjustments.

18. Transmission gearing comprising a drive shaft, a driven shaft, gearconnectionsbetween the drive and driven shafts, means coiiperating withsaid gear connections for formingapart of said gear connections whenunder oneadjustment, then imparting an indirect movement to the drivenshaft from the drive shaft, means for effecting such adjustment, andanother means for locking said gear connections to effect a direct drivebetween the drive and driven shafts, and a sin 1e lever actuated meansfor controlling sai locking means and said means for effecting'theadjustment of said indirect driving means.

19. Transmission gearing comprising a drive shaft, a driven shaft, gearconnections between said shafts to impart a direct drive from the driveto the driven shaft when under one adjustment and for imparting anindirect drive to the driven shaft when under another adjustment, meansfor effecting the several adjustments of said gear connections, saidmeans including a brake mechanism, means for actuating said brakemechanism to effect one adjustment, another means for locking thatportion of the gear mechanism carried by the drive shaft to the driveshaft to turn therewith, mechanism for selectively controlling saidlocking mechanismand said brake mechanism to effect the severaladjustments of the gears.

20. 'lransmissioir gearing comprising a drive shaft, a driven shaft,gear connections between said shafts to impart a direct drive from thedrive to the driven shaft when under one adjustment and for imparting anindirect drive to the driven shaft when under another adjustment, meansfor effecting the several adjustments of said gear connee: tions, saidmeans including a brake mechanism, means for actuating said brakemechanism to effect one ad ustment, another means for locking thatportion of the gear mechanism carried by the drive shaft to the driveshaft to turn therewith, mechanism for selectively controlling saidlocking mechanism and said brake mechanism to effect the severaladjustments of the gears, said mechanism including a rotatable selectingshaft, connections between said selecting shaft and said lockingmechanism, connections between said selecting shaft and said brakemechanism, and means for turning said selecting shaft.

21. Transmission gearing comprising a drive shaft, a driven shaft, gearconnections between said shafts to impart a direct drive from the driveto the driven shaft when under one adjustment and for imparting an'indirect drive to the driven shaft when un- -der another adjustment,means for effecting erase? anism to effect one adjustment, another meansfor locking that portion of the gear mechanism carried by the driveshaft to the drive shaft to turn therewith, mechan sm for selectivelycontrolling said locking mechanism and said brake mechanism toefi'ect'the several adjustments of the gears, said mechanism including arotatable selecting shaft, connections between sa d selecting shaft andsaid locking mechanism, connections between said selecting. shaft andsaid brake mechanism, means for turnlng said selecting shaft, said lastnamed means comprising a'single actuating lever and con nections betweensaid actuating lever and the selecting shaft.

22. Transmission gearing comprising a drive shaft and a driven shaft, agear car-v ried by the driven shaft, a gear loosely mounted on the driveshaft, a pinion on the drive shaft, orbital gears connecting said pinionwith said loose gear,and means for holding said orbital gears stationaryto im part movement to said loose gear in a direction opposite to thedirection of rotation of the drive shaft.

23. Transmission gearing comprising a drive shaft and a drlven' shaft, agear carried by the driven shaft, a gear loosely mounted on the driveshaft, a pinion on the drive shaft, orbital gears connecting said pinionwith said loose gear, means for hold- 7 mg said orbital gears stationaryto impart movement to said loose gear in a direction 0 posite to thedirection of rotation of the drive shaft, and another means for lockingsaid loose gear, said orbital gears and sald pinion together'to turnwith the drive shaft.

24:. Transmission gearing comprising a drive shaft and a driven shaft, agear carried by the driven shaft, a ear loosely mounted on the driveshaft, a pinion on the drive shaft, orbital gears connecting said pinionwith said loose gear, means for hold ing said orbital ears stationary toimpart movement to said loose gear in a direction opposite to thedirection of rotation of the drive shaft, and another means for lockingsaid loose gear, said. orbital gears and said pinion together to turnwith the drive shaft, and means for controlling said locking means andsaid orbital gear holding means to efiect the required adjustments ofthe mechanism.

25. Transmission gearing comprising a drive shaft and a driven shaft, agear carried by the driven shaft, a gear loosely mounted on the driveshaft, a pinion on the drive shaft, orbital gears connecting" saidpinion with said loose gear, means for holding said orbital gearsstationary to impart movement to said loose gear in a direction oppositeto the direction of rotation of the drive shaft, another means forlocking said loose gear, said orbital gears and said pinion'together toturn with the drive shaft, means for controlling said locking means andsaid orbital gear holding means to effect the required adjustments ofthe mechanism,

and a single lever actuated means for operating said controlling means.

26. Transmission gearing comprising a drive shaft and a driven shaft,gear connections between the drive and driven shafts, means for lockingsaid gears to impart a direct drive to the driven shaft from the driveshaft at times, another means for holding certain of said other gears tothrow the gears into train to impart an indirect drive to the drivenshaft from the drive shaft, and a single lever operated selecting andactuating mechanism for controlling said locking and holding mechanism.

' ROBERT W. COFFEE.

Witnesses:

J. A. HILLEARY, Jr, JOHN C. Morena...

